In addition to video functionality, If you are using this as your primary music source and want to play standard redbook CD's I would recommend hooking up the 2 channel audio connection and the digital connection and doing an A/B on the sound.....trust me, there should be a huge difference. Most players have better on board DAC's than the receivers do, but an A/B test will tell the truth. My Denon CD player has optical and analog outs.....I hooked both up to my receiver and A/B'd.....the analog outs powered by the Denon's Burr Brown DAC's literally blew away the optical connection. I believe you will have to hook up the optical connection on your DVD player anyways to get 5.1 surround sound...the standard analog cables won't handle that.
Hope this helps!
Foley